Patent GB-537103-A (GB)
Title: Improvements in and relating to sensitive photographic materials having colouring matters therein
IPC: G03C7/29
Filed: 1939-10-07
Abstract: 537,103. Photographic light-sensitive material. KODAK, Ltd. (Eastman Kodak Co.) Oct. 7, 1939, Nos. 25216/39 and 520/40 [the second Provisional Specification being divided out of the first Provisional Specification]. [Class 98 (ii)] Photographic material contains a colouring matter of the general formula shown in Fig. 1 or 2, where X and Y may be alkyl, aryl, or aralkyl, or cyclic or heterocyclic nuclei, or in which X and Y may together form a ring structure, and where D represents the residue of a colouring matter or X, Y and D not containing water solubilizing groups. X or Y may also be the residue of a col ouring matter or dye. In examples, (1) N-(p-tolylsulphonyl)-N-benzyl- 4-aminoazobenzene is used in a dye destruction process using acid bleaching baths for dye destruction in the image or non-image areas ; (2) 2:4-dinitro-6-(sulphondimethylamide)-benzeneazo-1-methyl-4<SP>1</SP>-dimethylaminobenzene is used as a filter dye or in a dye-destruction process ; (3) 1-phenyl-3-methyl-4 (41-nitro-6- sulphondiethylamide)-5-pyrazolone is used as a filter or antihalation dye ; (4) an alcoholic sodium hydroxide solution of 5-[N:N-(α-phenyln-propyl)(p-tolylsulphon)-amido]-1-naphthol is added to a 10 per cent. gelatine solution followed by the successive addition of aqueous solutions of 2-amino-5-diethylaminotoluene hydrochloride and potassium ferricyanide to give a bluegreen dyed gelatine solution which may be used to produce an antihalation or a filter layer or which may be mixed with silver halide emulsion ; (5) an indophenol dye is similarly formed from 2-chloro-5-(#-naphthalenesulphonbenzylamido)-1-naphthol and 2-amino-5- diethylaminotoluene hydrochloride ; (6) an azomethine dye is made from 2-cyanoacetylcoumarone-5-sulphur-N-n-anylanilide; (7) an azomethine dye is made from 2-cyanoacetylcoumarone-5-sulphon- N -n-amyl-p-tertiary amyl anilide and 2-amino-5-diethylaminotoluene hydrochloride ; and (8) an azomethine dye is made from 2-cyanoacetylcoumarone-5- sulphon-N-(y-phenylpropyl)-p-tertiary anyl anilide and 2-amino-5-diethylaminotoluene hydrochloride. The methods of making colloidel suspensions of indophenol dyes described in Specification 390,093 may be applied to the sulphonamide dye couplers. Gelatine dispersions of sulphonamide couplers may be treated with diazonium salt solutions to give azo dyes or with p-phenylenediamine derivatives and a mild oxidizing agent to give azomethine dyes. The sulphonamide couplers described in Specifications 531,246 and 531,312 may be employed. A glass, cellulose ester, or synthetic resin support may carry on the opposite side to the emulsion layer an antihalation layer containing a dye having a sulphonamide group, preferably a di-substituted sulphonamide group. A similar layer may be provided as the yellow filter layer between the top blue-sensitive and middle layers of three-layer colour photographic material. Alternatively the dye may be incorporated in the top layer and serve both for filter and image-production purposes. Specifications 468,560, 475,784 and 475,786 also are referred to. According to the second Provisional-Specification, X or Y or both may be hydrogen. Specification 390,093 also is referred to.